All Things D refers to SoundCloud as a music service. But, it is really more like Twitter for audio. SoundCloud lets you record audio and then distribute it via its web page, email, Facebook or Twitter. You could also think of it as a kind of mini-podcast creation and distribution service. Up to 120 minutes of audio can be stored under the free SoundCloud plan. This is a total storage limit, not a monthly one. So, SoundCloud only makes sense for short audio snippets.